KR20170009437A - collet nut for tool holder - Google Patents

collet nut for tool holder Download PDF

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Publication number
KR20170009437A
KR20170009437A KR1020150101488A KR20150101488A KR20170009437A KR 20170009437 A KR20170009437 A KR 20170009437A KR 1020150101488 A KR1020150101488 A KR 1020150101488A KR 20150101488 A KR20150101488 A KR 20150101488A KR 20170009437 A KR20170009437 A KR 20170009437A
Authority
KR
South Korea
Prior art keywords
collet
nut
spindle
tool
collet nut
Prior art date
Application number
KR1020150101488A
Other languages
Korean (ko)
Other versions
KR101918586B1 (en
Inventor
박중한
박차기
Original Assignee
이더블유에스 코리아 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 이더블유에스 코리아 주식회사 filed Critical 이더블유에스 코리아 주식회사
Priority to KR1020150101488A priority Critical patent/KR101918586B1/en
Publication of KR20170009437A publication Critical patent/KR20170009437A/en
Application granted granted Critical
Publication of KR101918586B1 publication Critical patent/KR101918586B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/20—Collet chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/20—Collet chucks
    • B23B2231/2078—Jaw carriers, i.e. components retaining the collet itself

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

The present invention relates to a collet nut which is used to fix a tool for processing handcrafts, and more specifically, to a collet nut for a tool holder comprising a collet nut included in one side of a tool holder, wherein, as the collet nut is coupled deeper to an adaptor or a spindle, the collet nut is inserted more into the adaptor and spindle so as to fasten a collet that fixes a cutting tool, thereby improving a fixation power. Accordingly, a user is able to conveniently use the cutting tool by easily mounting or removing the cutting tool by installing or removing the collet nut in or from the adaptor or the spindle.

Description

Collet nut for tool holder}

The present invention relates to a collet nut used for fixing a tool for machining a work, and more particularly, to a collet nut formed at one side of a tool holder so that the collet nut is inserted into an adapter or a spindle as it is deeply coupled to an adapter or a spindle. Is a collet nut for a tool holder that tightens the collet that fixes the cutting tool to improve the fixing force of the cutting tool.

Generally, a tool holder is a holder used for mounting a cutting tool such as a drill, a bite, and a boring bar, and is mounted on a machine tool to be used for machining a workpiece.

Such a tool holder is mainly used for attaching and detaching the tool, and the outer diameter of the collet is changed to attach or detach the tool.

As a conventional tool holder, there is an adapter replaceable tool holder using a hinge pin proposed in Japanese Patent No. 10-1229465 filed by the present applicant.

The tool holder includes a body, a spindle formed in the body, and an adapter inserted into the spindle. The adapter includes a body, Wherein the spindle includes a block rotatable about a hinge pin and a bolt fastened to the bolt fastening hole formed in the block, wherein the bolt is inserted into the fastening groove of the adapter And the adapter can be tightly fixed to the spindle as it is deeply fastened to the bolt fastening hole formed in the block. In the adapter replaceable tool holder using the hinge pin, the adapter having the collet for fixing the cutting tool is inserted into the spindle As a way of tightening the adapter with a bolt to join, when separating the cutting tool, The bolt must be loosened first when the tool is removed, and then the hook formed on the circumferential surface of the adapter is inserted into the hole and a hook spanner or a wrench is inserted. It is disadvantageous in that the detachment of the tool is troublesome.

Therefore, according to the present invention, a collet nut is additionally provided on one side of a tool holder, and as the collet nut is deeply coupled to an adapter or a spindle, it is inserted into an adapter or a spindle to tighten a collet for fixing the cutting tool, It is an object of the present invention to provide a collet nut for a tool holder.

Another object of the present invention is to provide a collet nut for a tool holder capable of mounting and dismounting a cutting tool by merely attaching and detaching the collet nut to an adapter or a spindle.

A collet nut for a tool holder according to the present invention is a collet nut for use in a tool holder, wherein the collet nut has a nut body formed with an outer surface with a screw and an inclined surface formed therein, And a protruding portion having a hollow hexagonal cross section.

A collet nut for a tool holder according to the present invention is constituted by a collet nut at one side of a tool holder and is inserted into an adapter or a spindle as the collet nut is deeply coupled to an adapter or a spindle to tighten a collet for fixing the cutting tool, And the cutting tool can be attached and detached only by the operation of attaching / detaching the collet nut to / from the adapter or the spindle, so that the user can conveniently use the tool.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 2 is an exploded view
3 is a partial schematic view of the present invention
Figure 4 is a cross-
Fig. 5 is a view showing a configuration of a collet nut and an adapter according to the present invention
6 is a diagram illustrating an example of the use state of the present invention
FIG. 7 is a cross-sectional view
FIG. 8 is a diagram illustrating an example of the use state of the present invention

The present invention relates to a collet nut used for fixing a tool for machining a workpiece, and more particularly, to a collet nut formed on one side of a tool holder so that the collet nut is inserted into an adapter or a spindle as it is deeply coupled to an adapter or a spindle. Is a collet nut for a tool holder that tightens the collet that fixes the cutting tool to improve the fixing force of the cutting tool.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a partial structural view of the present invention, FIG. 4 is a sectional view of FIG. 3, and FIG. 5 is a cross-sectional view of a collet according to the present invention. FIG. 6 is a view illustrating the use state of the present invention. FIG. 6 is a view illustrating a use state of the present invention. The collet nut for a tool holder according to the present invention has a nut body 8e having a screw 8e formed on an outer surface thereof and an inclined surface 8d formed therein And a protruding portion 8b integrally formed with the nut body 8a and having a hollow hexagonal cross section.

The tool holder includes a shank 10 fastened to a machine tool, a body 1 coupled to the shank 10, A cover 9 coupled to the body 1; a spindle 2 fixedly coupled to the body 1 and the cover 9 to be rotatable; an adapter 3 fixedly coupled to the spindle 2; And a collet (7) inserted in the adapter (3) and fixing the cutting tool.

A collet nut (8) having a screw formed on an outer circumferential surface thereof is coupled to the adapter (3), and a screw corresponding to the screw is formed on the inner circumferential surface of the adapter (3) The cutting tool engaging groove 7a of the collet 7 can be reduced as it is deeply fastened to the insert 3.

The tool holder includes a shank 10 fastened to a machine tool, a shank 10 coupled to the shank 10, and a tool holder 10, A cover 9 coupled to the body 1; a spindle 2 fixedly coupled to the cover 9; a spindle 2 inserted into the spindle 2, And a collet (7). The spindle (2) is coupled with a collet nut (8) having a thread formed on an outer circumferential surface thereof, and a screw corresponding to the screw is formed on an inner circumferential surface of the spindle As the collet nut 8 is deeply coupled to the spindle 2, the cutting tool engagement groove 7a of the collet 7 can be reduced.

The tool holder which can use the collet nut proposed by the present invention can be used for all kinds of machine tools in which the rotational power is transmitted to the spindle 2. The machining center or the automatic lathe tool It can also be used as a holder and also for turret tool bands mounted on such machine tools.

That is, when the shank 10 integrally formed or formed integrally with the body 1 is fastened to the shank coupling groove (not shown) formed on the machine tool, the power of the motor formed on the machine tool is transmitted to the spindle The power transmitted to the spindle 2 is transmitted to the spindle 2 through the key 11 in the form of a key 11 coupled to the spindle 2 Is transmitted to the collet (7) through the adapter (3) and the collet nut (8) and then to the cutting tool (12) coupled to the collet (7) to process the workpiece.

A cover 9 is formed on one side of the body 1. The cover 9 is fixed to the body 1 so that the cover 9 is fixed to the body 1. [ 9 and the body 1 may be regarded as one component.

The spindle 2 is supported by bearings (not shown) formed on one side of the spindle 2 so as to minimize interference with rotation, and the adapter 3 having a tapered bag is inserted into the spindle 2 do.

In this case, the collet 7 is formed in the adapter 3 as shown in the figure. When the collet 7 is accommodated in the tool holder without the adapter 3, that is, the spindle 2 itself, A collet nut 8 according to the present invention may be directly coupled to the spindle 2 by forming a screw on the inner surface of the spindle 2.

One or more tool clamping grooves 4 are formed in the adapter 3 of the illustrated tool holder. In the illustrated embodiment, a total of six tool clamping grooves 4 are formed along the circumferential surface of the adapter 3 at regular intervals And a block 5 rotatable about a hinge pin 14 is formed on the spindle 2 and a bolt 6 is fastened to the block 5.

The tool holder according to the present invention having such a basic configuration can couple and separate the adapter 3 to and from the spindle 2 by the rotation of the block 5 when the adapter 3 is coupled to the spindle 2 The adapter 3 is inserted into the spindle 2 and the positions of the grooves formed in the adapter 3 and the spindle 2 are matched with each other and then the block 5 is pivoted and then the adapter 3 and the spindle When the adapter 3 and the spindle 2 are separated from each other, the bolts 6 are released and the adapter 3 is pulled out as shown in the block 5.

When the collet 7 inserted into the adapter 3 externally exerts a force in the direction of the center axis of the collet 7, the tool engaging groove 7a formed at the center of the collet 7 is contracted to hold the tool And then the external force is released, the collet 7 itself returns to the original state of the tool engaging groove 7a by the elasticity of the collet 7 itself, thereby separating the cutting tool. ).

That is, a collet nut 8 having a screw formed on the outer circumferential surface is coupled to one side of the adapter 3, and a screw corresponding to the screw is formed on the inner circumferential surface of the adapter 3, 8 of the collet 7 are deeply fastened to the adapter 3, the outer diameter of the collet 7 is reduced so that the tool engaging groove 7a formed in the collet 7 is reduced and the fastening force of the cutting tool 12 is improved.

The collet nut 8 includes a nut body 8a having an outer surface formed with a screw 8e and an inclined surface 8d formed therein and a nut body 8a formed integrally with the nut body 8a, The nut body 8a and the protruding portion 8b are formed by cutting using one material and formed integrally with each other and the screw 8e formed on the outer surface of the nut body 8a and the protruding portion 8b is integrally formed with the adapter 3 And the inclined surface 8d formed in the inside abuts against the inclined surface of the collet 7 to exert an external force on the collet 7.

As shown in FIGS. 3 and 4, the protruding portion 8b has a hollow hexagonal shape and a hexagonal piece 8f protruding from the outermost end of the pipe so as to extend beyond the outer diameter of the pipe. (Wrench) used for joining the collet nut 8 to the collet nut 8 to facilitate the tightening and unscrewing of the collet nut 8, and a standardized wrench other than a dedicated wrench, that is, a hexagonal piece 8f, So that the size of the hexagonal screw can be used as a standard spanner.

6, when the adapter 3 is fixed to the spindle 2, the hook spanner 15 is inserted into the tool engagement groove 4 formed on the circumferential surface of the adapter 3, In order to tighten the collet 7 in which the cutting tool 12 is inserted in the adapter 3 in the radial direction of the loosely coupled collet nut 8, the wrench 16a The collet nut 8 is firmly fixed to the adapter 3, and thereby the cutting tool 12 is fastened. When the collet nut 8 is detached or loosened by the adapter 3, work is performed in the reverse order of the above-mentioned operation procedure.

The user who performs such work may accidentally fall out of the collet nut 8 in the axial direction of the collet nut 8 in the axial direction of the collet nut 8 if a force is applied to firmly fix the cutting tool 12, In order to prevent this, a hexagonal piece 8f is formed at the outermost end of the hexagonal pipe so that the hexagonal pipe and the hexagonal piece 8f are stepped to prevent the spanner 16 from being separated, thereby preventing a safety accident. In addition, when the wrench 16a used exclusively for the fastening operation of the collet nut 8 can not be used due to loss or the like, it is advantageous to work with a hexagon piece 8f made of a standard using a standard wrench have.

The nut body 8a is formed with an eccentric hole 8g eccentric from the center axis of rotation so as to allow the collet 7 and the collet nut 8 to be engaged. That is, the collet 7 in which the stop ring is inserted can be effectively attached and detached using the eccentric hole 8g of the collet nut 8.

FIG. 7 is an explanatory view of the tool according to the present invention. FIG. 8 is an explanatory diagram illustrating the use state of the tool according to the present invention, wherein the collet nut 8 has two collet nuts 8 And the spanner 16b can be inserted and removed from the end face.

That is, as in the above-described embodiment, the collet nut 8 is formed with a plurality of tool engaging grooves 8c on the outer circumferential surface of the collet nut 8 instead of the hexagonal pipe and the hexagonal piece, The collet nut 8 can be made to be able to be unscrewed by the spanner 16b having the protrusions corresponding to the shape of the collet nut 8c. In this case, it is advantageous that a standardized wrench 16b, which is manufactured as a standard and possesses a collet nut for a factory, can be used.

The spanners 16a and 16b used in the above-described embodiments are made up of a head portion directly touching the collet nut 8 and a knob portion. The knob portion is partially bent so that the user's hand is spaced a certain distance It is possible to tighten or loosen the collet nut 8 in a detached state, thereby improving work efficiency and preventing safety accidents.

As a result, the collet nut for the tool holder according to the present invention has a collet nut 8 on one side of the tool holder so that the adapter 3 can be inserted into the adapter 3 or the spindle 2, The collet nut 7 is inserted into the spindle 2 to tighten the collet 7 for fixing the cutting tool 12 so that the clamping force of the cutting tool 12 can be improved. The cutting tool 12 can be mounted and dismounted only by the operation of attaching and detaching to and from the spindle 2, so that the user can conveniently use the tool.

1. Body 2. Spindle
3. Adapter 4. Tool tightening groove
5. Block 6. Bolt
7. Collet 7a. Cutting tool engagement groove
8; Collet nut
8a. Nut body 8b. Projection 8c. Tool-engaging groove
8d. Slope 8e. Screw 8f. Hexagonal
8g. Eccentric hole
9. Cover 10. Shank
11. Key 12. Cutting tool
13. Coolant adapter 14. Hinge pin
15. Hook spanner 16a, 16b. spanner

Claims (6)

A collet nut for use in a tool holder,
The collet nut 8 includes a nut body 8a having an outer surface formed with a screw 8e and an inclined surface 8d formed therein and a nut body 8a formed integrally with the nut body 8a, And a protruding portion (8b) having a protruding portion (8b). The collet nut for a spindle or a tool holder.
The method according to claim 1,
The tool holder comprises a shank 10 fastened to a machine tool, a body 1 coupled to the shank 10, a cover 9 coupled to the body 1, A spindle 2 rotatably fixed to the cover 9; an adapter 3 fixedly coupled to the spindle 2; a collet 7 inserted in the adapter 3 and fixing the cutting tool; And,
A collet nut (8) having a screw formed on an outer circumferential surface thereof is coupled to the adapter (3), and a screw corresponding to the screw is formed on the inner circumferential surface of the adapter (3) And the cutting tool engaging groove (7a) of the collet (7) is reduced as it is deeply engaged with the collet nut (3).
The method according to claim 1,
The protruding portion 8b prevents the wrench 16a used for engaging the collet nut 8 from being detached and facilitates the fastening of the collet nut 8 and the standard wrench 16a Wherein a stepped portion is provided so as to be able to use the tool.
The method according to claim 1,
Wherein the nut body (8a) is formed with an eccentric hole (8g) eccentric from the center axis of rotation.
The method according to claim 1,
Characterized in that the collet nut (8) is formed with at least two tool engagement grooves (8c) on one side so that the wrench (16b) can be inserted on the cross-section side of the collet nut (8).
The method according to claim 1,
The tool holder includes a shank 10 fastened to a machine tool, a body 1 coupled to the shank 10, a cover 9 coupled to the body 1, And a collet (7) inserted in the spindle (2) and fixing the cutting tool,
A collet nut 8 having a thread formed on an outer circumferential surface thereof is coupled to the spindle 2 and a screw corresponding to the screw is formed on an inner circumferential surface of the spindle 2, And the cutting tool engagement groove (7a) of the collet (7) is reduced as it is deeply coupled to the collet nut (2).
KR1020150101488A 2015-07-17 2015-07-17 collet nut for tool holder KR101918586B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150101488A KR101918586B1 (en) 2015-07-17 2015-07-17 collet nut for tool holder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150101488A KR101918586B1 (en) 2015-07-17 2015-07-17 collet nut for tool holder

Publications (2)

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KR20170009437A true KR20170009437A (en) 2017-01-25
KR101918586B1 KR101918586B1 (en) 2018-11-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518380A (en) * 2018-06-01 2018-09-11 苏州好特斯模具有限公司 Quick-change type vertical cooling hydraulic cylinder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522605A (en) * 1994-08-10 1996-06-04 Kennametal Inc. Collet chuck having parpallel force loaded bearing
JP4727208B2 (en) * 2003-11-28 2011-07-20 ユキワ精工株式会社 Chuck device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518380A (en) * 2018-06-01 2018-09-11 苏州好特斯模具有限公司 Quick-change type vertical cooling hydraulic cylinder
CN108518380B (en) * 2018-06-01 2024-04-30 苏州好特斯模具有限公司 Quick-change three-dimensional cooling hydraulic cylinder

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Publication number Publication date
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